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<svg xmlns="http://www.w3.org/2000/svg"
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<script type="text/javascript">
<![CDATA[

function boom()
{
  try {
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  } catch (e) { }
  document.documentElement.removeAttribute("class");
}

window.addEventListener("load", boom, false);

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<animate id="x" begin="a" />
</svg>
